APA

Mehrtens J. M., . (1987). Living snakes of the world. New York: Sterling [u.a.].

Chicago

Mehrtens John M, . 1987. Living snakes of the world. New York: Sterling [u.a.].

Harvard

Mehrtens J. M., . (1987). Living snakes of the world. New York: Sterling [u.a.].

MLA

Mehrtens John M, . Living snakes of the world. New York: Sterling [u.a.]. 1987.